Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Methods of creating solar-reflective nonwhite surfaces and their application to residential roofing materials
We describe methods for creating solar-reflective nonwhite surfaces and their application to a wide variety of residential roofing materials, including metal, clay tile, concrete tile, wood, and asphalt shingle. Reflectance in the near-infrared (NIR) spectrum (0.7-2.5 micrometer) is maximized by coloring a topcoat with pigments that weakly absorb and (optionally) strongly backscatter NIR radiation, and by adding an NIR-reflective basecoat (e.g., one colored with titanium dioxide rutile white) if both the topcoat and the substrate weakly reflect NIR radiation. Coated steel and glazed clay-tile roofing products achieved NIR reflectances of up to 0.50 and 0.75, respectively, using only cool topcoats. Gray-cement concrete tiles achieved NIR reflectances as high as 0.60 with coatings colored by NIR-scattering pigments. Such tiles could attain NIR reflectances of up to 0.85 by overlaying a white basecoat with a topcoat colored by NIR-transparent organic pigments. Granule-surfaced asphalt shingles achieved NIR reflectances as high as 0.45 when the granules were covered with a white basecoat and a cool color topcoat.
Methods of creating solar-reflective nonwhite surfaces and their application to residential roofing materials
We describe methods for creating solar-reflective nonwhite surfaces and their application to a wide variety of residential roofing materials, including metal, clay tile, concrete tile, wood, and asphalt shingle. Reflectance in the near-infrared (NIR) spectrum (0.7-2.5 micrometer) is maximized by coloring a topcoat with pigments that weakly absorb and (optionally) strongly backscatter NIR radiation, and by adding an NIR-reflective basecoat (e.g., one colored with titanium dioxide rutile white) if both the topcoat and the substrate weakly reflect NIR radiation. Coated steel and glazed clay-tile roofing products achieved NIR reflectances of up to 0.50 and 0.75, respectively, using only cool topcoats. Gray-cement concrete tiles achieved NIR reflectances as high as 0.60 with coatings colored by NIR-scattering pigments. Such tiles could attain NIR reflectances of up to 0.85 by overlaying a white basecoat with a topcoat colored by NIR-transparent organic pigments. Granule-surfaced asphalt shingles achieved NIR reflectances as high as 0.45 when the granules were covered with a white basecoat and a cool color topcoat.
Methods of creating solar-reflective nonwhite surfaces and their application to residential roofing materials
Levinson, R. (Autor:in) / Berdahl, P. (Autor:in) / Akbari, H. (Autor:in) / Miller, W. (Autor:in) / Joedicke, I. (Autor:in) / Reilly, J. (Autor:in) / Suzuki, Y. (Autor:in) / Vondran, M. (Autor:in)
2007
11 Seiten, 21 Quellen
Aufsatz (Zeitschrift)
Englisch
Antireflexschicht , Asphalt , hydraulischer Zement , Ton (Mineral) , Beton , Infrarotspektrum , optische Dünnschicht , Pigment , Dach , Stahl , Fliese , Holz , Metalle , Einfärbung , Reflexionsvermögen , Granulat
SOLAR-REFLECTIVE ROOFING GRANULES, ROOFING PRODUCTS INCLUDING THEM, AND METHODS FOR MAKING THEM
| Europäisches Patentamt | 2019
Solar-reflective roofing granules, roofing products including them, and methods for making them
| Europäisches Patentamt | 2021
SOLAR-REFLECTIVE ROOFING GRANULES, ROOFING PRODUCTS INCLUDING THEM, AND METHODS FOR MAKING THEM
| Europäisches Patentamt | 2019
| Europäisches Patentamt | 2019
| Europäisches Patentamt | 2019